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2 years ago

Determine the speed of a falling object 7.8 sec after it dropped.

Physics

1 answer:

butalik [34]2 years ago

7 0

Answer:

76.4m/s

Explanation:

Given parameter:

Time taken = 7.8sec

Unknown:

Speed after it dropped = ?

Solution:

To solve this problem, we use one of the kinematics equation:

V = U + gt

V is the final speed

U is the initial speed = 0m/s

g is the acceleration due to gravity

t is the time taken

V = 0 + 9.8 x 7.8 = 76.4m/s

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Sergeeva-Olga [200]

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(a) 32.5 kgm/s

(b) 32.5 Ns

(c) 10.8 N

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The change in momentum can be calculated from the definition of linear momentum:

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